Compasses or dividers.



ing mechanism, and opposing decorticating members that extendlongitudinally of the machine and which are moved downwardly away fromthe stock holding mechanism when in engagement with the stock, mechanismfor propelling the opposing decor-ticating menbers away from the stockholding mechanism, mechanism comprising an intermittent gearing betweenthe l'ieCi'ltl-i'llsl -or propelling the decorticating members on theone hand and the feeding chanism on the other so that an in ermovementcan be imparted to tlie mechanism.

In a machine of the class described combination of stock holdingmechanism comprising stock holding grippers, mechanism comprisingendless chain and carrying grippers arranged to engage the upper end ofthe stock so as to convey it in position to be held by-the stock holdinggrippers, mechanism for removing pulp and waste from the stock as thelatter depends the stool; holding grippers which'engages the upperportion of the stock below. a carrying gripper and common mechanism Allthe pup and waste removing mechanism, the stool: holdin ripper and thefeeding mechanism, said common mechanism comprising a cam for actuatingthe stock holding gripper and an intermittent for imparting intermittentmoveto' feeding mechanisii 5. In a machine of the class described, afeeding mechanism comprising a pair of sprockets, an endless chaincarried and operated said sprockets, a pair or longi tudinally extendingfixed guideways located on opposite sides of the chain, carryinggrippers connected to said chain, said carrying grippers baringlongitudinally extending jaws, and and oppositely extending portionswhich engage said guideways so as to retain the said jaws in the properposition as they are moved longitudinally by chain, said being springpressed toward each other and one them being provided with a laterallyextending arm whereby said jaws can be separated.

8. ln machine of the class described, a pair of sprockets mounted onshafts carried in bearings the frame, endless chain in mesh with saidsprockets, longitudinally extending goiding or holding members locatedon opposite sides of said chain, carrygripi iers secured to said chain,said carrying gripp rs comprising spring presse longitudina y extendingand a laterally extending -andle for opening the jaws against thepressure of the spring, said carrying grippers ha ing portions whichenthe said oppositely di guideways so when '"ne handle is pressed thegripner will be 'ned in its proper position. A it acli'ne of the classdescribed comga go prising a. frame, a feeding mecianism can riedthereby, mechanism for removing pulp and waste from the fiber e stockbeing treated, and mechanism whereby the pulp and waste removingmechanism and the feeding mechanism will operate in timed relation withrespect to each other, the feeding mechanism comprising a serieslongitudinally extending carrying grippers which are connected to anendless chain which is also part of the feeding mechanism, there beinglocated holding i embers on opposite sides of the chain, longitudinallyere tending members for holding the carrying grippers in position and ain the path of the carrying grippers for causing the latter to openpredetermined times while the grippers are being moved longitudinally.

8. ln machine of the class described, the combination of an endlesschain, sprockets upon which the chain is carried, a series of carryinggrippers secured to the chain, each of said ippers having longitudin r rextending jaws, fixed longitudinally eirte ing ways or guides areengaged by portions of the carrying grippers and serve means formaintaining the carrying grippers in the proper position, and means located in the path of the carrying grippers for causing one of said jawsto be moved laterally relative to the companion jaws while in engagementwith said guideways at a time when the grippers reach a cos a place intheir 9. l combination of holding grippers and a feeding mechanismcomprising an endless chain having connected thereto a series of stoclrcarrying grippers, the machine also comprising members for guiding orholding the stock carrying grippers, and mechanism ior automaticallyopening said stoclr carrying grippers and constructed so as to permitsaid stock carrying grippers to be closed upon the stool: when desired.

10. in a machine of the class described pair of opposing stock engagingmembers which are propelled downwardly by endless conveying chains whenthe said members are W in engagement with the stock, said endless chainsalso carrying below the stock en gaging members a pair of aprons whichare located between the'chains and travel therewith for protectingchains from the substance removed from the stock being C. E. HAND.

COMPASSES OR DIVIDERS.

APPLICATION FILED MAY 4. 1911.. RENEWED NOV. 21. 1914.

Win/asses. J M

R M U UNITED TATE PATENT @FFIQE.

CHARLES EDWARD HAND, OF ST. CATHARINES, ONTARIO, CANADA.

COMPASSES 0R DIVIDERS.

Application filed May 14, 1911, Serial No. 625,095.

To all whom it may concern Be it known that I, CHARLES EDWARD HAND, asubject of the King of Great Britain, residing at St. Catharines, in thecounty of Lincoln, in the Province of Ontario, Can'- ada, have inventedcertain new and useful Improvements in Compasses or Dividers, of whichthe following is a specification.

My invention relates to improvements in compasses or dividers, andrelates more particularly to improving the construction of the compassor dividers disclosed in my allowed United States application, filedOctober 1, 1909 under Number 520,582, and in my United States PatentNumber 920,461, dated May 4, 1909. Now in these compasses or dividers,as well as in connection with the present invention, the markingelements will always be held substantially perpendicular to the work nomatter in what operative position the legs of the compass may be, andmore specifically stated, the objects of the present invention arefirstly: to provide a particular construction of yoke situate in thehead of the compass or dividers so that by means of the co-actiontherewith of the pressure screw and nut, the upper ends of thelink-members can be gripped between the yoke plates of the yoke and sokeep the links under tension as well asthe legs of the tool. Inconstructing the yoke plates, they are made so that the same will notgrip the link-members below their upper ends; secondly: to pivot theupper end of each link-member on each side in the yoke plates betweenwhich the upper ends are placed, thus providing means whereby the saidlink-members will be positively piv oted in position so as to insureaccurate work being done with the tool; thirdly: to so pivot the socketmembers to the lower end of the legs, and the lower end of the linkmembers to said socket members, that a larger and stronger link membermay be used than is now ordinarily the case, and which can be almostcompletely housed within the legs; fourthly: to place the pivots of thelegs and link-members where they are associated with the socket-membersunder tension so as to keep these parts at their pivoted points fromgetting loose; fifthly: to provide the pivot holes in the lower end ofeach leg with recesses or pockets whereby the pivots uniting the same tothe socket Specification of Letters Patent.

ab, Fig. 1.

Patented July 6, 1915.

Renewed November 21, 1914. Serial No. 873,283.

members will always wear to a hearing. If desired, a suitable lubricant,such as wax, may he placed in the said recesses or pockets. Sixthly: toprovide means carried by the socket members to take up side wear on thelower ends of the legs and the link-members, and to so position thesaidmeans as to ren der substantially equal the pressure exerted by thesame against the lower ends of the legs and the lower ends of thelink-menr bers; seventhly: to so pivot the lower ends of the legs in thesocket members so that the lower ends of the link-members, when thecompass or dividers is opened out wide, can freely pass through thepivotal axis of the lower end of each leg, and eighthly, to provide animproved construction of lead holder which will permit various sizes ofa graphite pencil or other marking element to be used and firmly held inplace, and broadly speaking, my compasses or dividers consists of a pairof legs, the upper ends of which are associated together with a pair ofyokeplates and a spacing-member which are all united by a pressure-screwand nut, the yoke-plates being of particular construction to allow theupper ends of the link-members associated with the legs to be pivotedtherein after a particular manner; socketanembers to which the lowerends of said legs, and link-members, are pivoted after a particularmanner, means being provided to provide for the transverse wear on thepivot bearings for the lower ends of the legs and link-members, andfurther means being provided to provide for the lateral wear on thelower ends of the legs and link-members, as hereinafter particularly setforth.

Figure l is a front side elevation of my tool. Fig. 2 is a verticalsection on the line Fig. 3 is, in part, a rear side elevation of mytool, the handle being in section, and one of the legs longitudinallycut through. Fig. 4 is a front view, on an enlarged scale, of the yoke,showing the upper ends of the link-members in closed position. Fig. 5 isa vertical section on the line ccl, Fig. 4. Fig. 6 is an end elevationof the yoke. Fig. 7 is, in part, a side elevation of one of the socketmembers, on an enlarged scale, and a section on the line 6f, Fig. 3.Fig. 8 is an elevation of the rear side of one of the socket members.Fig. 9 is a longitudinal section through a portion of one of the socketmembers and the holder for the marking element. Fig. 10 is alongitudinal section through the tube of the marking-element holder, anddetails. Fig. 10 is a bottom plan view of the tube of the markingelement holder. Fig. 11 is a perspective view of the marking-elementholder operating within the tube illustrated in Fig. 10. Fig. 12 is across section through the lower end of one of the legs, and Fig. 13 is aside elevation of the spacing members of the yoke. Fig. 14: is a sideelevation of the upper end of the tube illustrated in Fig. 10, and Fig.15 is a plan view of the upper end of the said tube.

In the drawings, like characters of reference indicate correspondingparts in each figure.

One of my chief improvements is to construct my compass or dividers sothat the link-members and legs will be doubly p1voted at their pivotedlower ends: that is to say, in place of only providing a single pin orpivot for the pivotal points, certain bosses or lugs are stamped out inpairs, from portions of the socket members, to pivot the lower ends ofthe legs and link-members in place, and certain lugs or bosses areformed in the upper ends of said link-inem bers and one of the yokeplates, these bosses or lugs, when positioned, being in alinement, thuspositively and snugly pivotally anchoring the upper ends of eachlink-member in place: not only does this cheapen the construction, butit also enables me to save time in assembling the component parts ofeach tool.

The legs A and B are preferably tubular in shape, as shown in Fig. 12,and integrally formed therewith are pairs of disks a and b. Uponreferring to Fig. 2 it will be noticed that these disks are so placedthat one disk of each leg is positioned between the pairs of disks ofthe other leg. Positioned between the inner pair of opposing disks a andZ), is a yoke which is composed of a spacing-member C and yoke-plates Dand E.

F is a pin carried by the spacing-member C and which secures the saidyoke-plates thereto. The spacing-member C is shaped as shown at 2, Fig.13 (see dotted lines Figs. 3 and 4,) to provide room for the upper end 3of the link-members t and 5. The upper end of each link-member isProvided with a boss 6, and each boss 6 extends into a hole 7 formed inthe yoke-plate E. In forming the bosses 6, a bedway 8 is formed in theupper end of each link-member, and resting in each of these bedways is aboss 9 formed in the yoke-plate D. It will be understood that the upperend of each linkmember is pivoted on both sides by the bosses 6 and 9,resulting in the advantages before clearly set forth.

The pressure-screw 11 passes through the pairs of disks a and b andthrough the parts composing the yoke. Upon referring particularly to thedotted lines in Fig. 5, it will be noticed that the spacing member C isthinner than the upper ends of the links 4 and 5. As shown clearly inFigs. 2 and 3, the upper ends of the legs A and B are provided withlongitudinal slots 12. Now by means of the pressure-screw 11 and its nut13, when this nut is screwed, the described construction of the upperend of each leg will permit the disks to laterally yield and as the saidspacing member C is thinner than the upperv ends of the legs .L and 5,the yoke-plates will be moved so as to cause the upper ends of thelink-members 1 and 5 to be gripped between the wings 15 and 1 .2 of thesaid yoke-plates, and thus provide for the desired stiffness in the headof the tool, the yoke itself being held under the pressure of the screw11. The yoke-plates D and E are cut away as shown at 16 so that only theupper ends of the said linkmembers will be subjected to the pressure ofthe pressure-screw 11. I

Preferably integrally formed with the spacing-member C, is a bifurcatedextension G. This extension extends into the housing H carried by theleaves I and J, through which the pressure-screw 11 passes. The upperends of the members composing the extension G are provided with offsetends 6, which, when the said extension is inserted within said housing,have spring contact therewith. The leaves I and J are provided withvertical slots J and J and horizontal slots K. In order to keep the saidhousing and leaves in their vertical position, a pin L shown in Fig. 1is carried by each of the outer disks of the legs A and B. These pinsoperate in the slots K. The

vertical slots are necessary to allow for the vertical movement of theleaves I and J when the legs of the compass are moved. The housing alsoserves as a handle for the instrument.

The lower end of each link-member 4: and 5 is provided with a hole 17which passes transversely through'the same. The socketmembers arecomposed of a front-plate 18 with which are integrally formed sockets 19and 20.

21 is a front plate and same is riveted at 22 to the socket 19. Formedin the plates 18 and 21, so as to be in alinement are bosses 93 and 242,which have the relative position shown in Fig. 7, and thesebosses'extend one into each side of the hole 17. The lower end of eachleg is laterally cut away as shown at 25 (see Figs. 3 and 12) so as toprovide an opening which is occupied by the lower end 26 of thelink-member associated with each leg.

Formed in the plates 18 and 21 respectively, are bosses 27 and 28. Thesebosses are of course in alinement and occupy the position shown in Fig.7, and extend into the holes 29 formed in the lower end of each leg Aand B. Upon referring particularly to Fig. 7, it will be seen that thebosses 27 and 28 are flush with the inner surface of the leg, and as thelink-members are positioned within the legs, it is clear that when thetool is opened out wide, the lower end 26 of each link-member can movefreely between the bosses 27 and 28. This construction enables me toprovide a very strong link-member, because it has not to be weakened inany way as would necessarily be the case were a pin used in place of thebosses 27 and 28: because if a pin were used, in order to preventconflict between the lower ends of the link-members and the said pinswhen the legs are opened out wide, these lower ends of the link-memberswould have to be notched: now by reason of the said bosses this isavoided. Each link-member is cut away as shown at 30, and resting inthis cutaway portion is a leaf-spring 31. This leaf-spring alwayscontacts with its associated wall of the leg within which it is housed,and as a result the pressure is always exerted so as to cause the bosses27 and 28 to wear to a bearing always in one direction.

Upon referring to Figs. 3 and 7 it will be noticed that the holes 29 inthe lower end of each leg are provided with pockets 32 openingthereinto. Now these pockets will naturally determine the direction ofwear of the bosses 27 and 28 and so insure the same always wearing to abearing. If desired, any suitable lubricant such as graphite or beeswax,may be placed in the said pockets 32. The wider the legs are movedapart, until they reach an angle of substantially 90 degrees with eachother, the greater will be the tension against the spring 31. It will benoticed that this spring is curved, and that its ends; are curvedoppositely to its middle portion. When the spring 31 is at maximumtension the middle portion is somewhat flattened out which tends tocause its ends to recede from each other, but at the same time thespring is bent more sharply near the ends which bend down into therecesses 321 thus bending to draw the ends of the spring toward eachother and counteract the effect of flattening out the said middleportion. An advantage results from this construction in that it permitsthe spring to be made to fit its position more snugly than if therecesses 321 were not used and the ends of the spring were not curved asdescribed.

Screwing through the plates 18 and 21 is a compensating screw 33, thefunction of which is to give the necessary lateral pressure against thelower ends of the legs A and B and the link-members, and take up anylateral wear at these bearing points. Whereas the spring 31 provides forthe transverse wear on the bosses 23 and 24 and 27 and 28, the screw 33provides for the lateral wear. I find that the spring 31 and the cutawayportion 30 can be dispensed with in more expensive makes of compasses,where the bosses formed in the plates 18 and 21, and the lower ends ofthe legs A and B and link-members 4 and 5, are specially hardened. Thecompensating-screw 33 should be positioned in the angle formed by thelines 34 and 35 drawn, respectively, through the center of the bosses 24and 28 and the center of the rivet 22. Upon referring particularly toFigs. 3 and 7 it is clear that the area of the legs A and B in contactwith the plates 18 and 21 is greater than the area of the lower ends 26of the link-members 4 and 5 in contact with the bosses 23 and 24.Therefore the position of the said screw should be such that thepressure exerted thereby will be distributed between the pairs of bosses27 and 28 and 23 and 24, so as to give the desired result.

Each end of the hole 17 formed in the lower ends 26 of the link-members4 and 5 is countersunk, and it will be noticed upon referring to Figs. 2and 7 that the bosses 23 and 24 are conical in shape having roundedends. So constructing these bosses enables me to form the m withoutbreaking the metal, they being necessarily punched deeply in order tospan the space between the plates 18 and 21, and the lower ends ofthetlinks due to the thickness of the metal forming the U-shaped portionof the legs.

As shown in Figs. 3 and 4, the upper ends of the link-members 4 and 5are curved as shown at 36, thereby enabling me to place these parts insmall compass, and so that they will not conflict with any of the otherparts when the tool is closed up.

The needle point 37 is held in the sockets of one of the socket members,and the preferred form of device for supporting the graphite pencil ormarking element is as follows: 38 is a tube the upper end of which isrounded as shown at 39 so as to fit the upper socket 20. From the point40 to the end of the tube, the same is provided with a longitudinal slot41. 42 is a shoe having a curved inner surface 43 between which and thewall of the tube 38 is gripped the pencil 44. 45 is a leaf spring,preferably integrally formed with the shoe 42, this spring is passedwithin the lower socket 19, and the upper end thereof is provided with atooth 46 which extends into the slot 47 formed in the tube 38. On eachside of the tooth 46 is formed a shoulder 48. These shoulders abutagainst the inner side of the tube 38 on each side of the slot 47 asshown at 49. The length of the shoe 42 and its relative position inrespect of the lower end of the tube 38, and the shape of the spring 45is such as to insure the lead 44: being gripped tightly in place. Ofcourse when the spring 4L5 is in the position illustrated, in Fig. 9, itis compressed by the socket 19.

Upon referring particularly to Figs. 8 and 4:, it will be noticed thatthe pivot points for the upper ends of the linkmembers 4- and 5 are solocated on the yoke that lines passing through the center of the saidpivotal points shall cross each other on the center of thepressure-screw 11. According to the position of the pivot points for theupper ends of the said link-members as illustrated in Figs. 3 and 4,these said pivot points occupy a position of substantially 45 degreesabove the central pivot 11. Positioning the pivot points as describedenables me to give the link-members their required movement.

I do not confine myself to the construction herein shown and describedexcept in so far as that may be rendered necessary by the prior state ofthe art, and the terms of my claims.

\Vhat I claim as my invention is 1. A compass or divider comprising apair of legs united by a pivot in their upper ends, a yoke memberassociated with the upper ends of the said legs and pivotedconcentrically therewith, means connecting the yoke with the upper endsof the legs whereby the vertical axis of the said yoke is maintained ina position centrally between the positions of the two legs, markingelements pivoted to the lower ends of the legs, a link associated witheach leg, each link being connected at its lower end with the markingelement on its associated leg and each link having its upper endpivotally connected to the said yoke at a point above and to one side ofthe central pivot thereof, the whole being so constructed that as thelegs are moved the marking elements will be held parallel.

2. A compass or divider consisting of a pair of chambered legs united bya pivot in their upper ends, a yoke member associated with the upperends of the legs and pivoted concentrically therewith, means connectingthe said yoke with the upper ends of the legs whereby the vertical axisof the said yoke is maintained in a position centrally between thepositions of the two legs, marking elements pivoted to the lower ends ofthe said legs, a link mounted within each leg each link having its lowerend connected to the marking element on its associated leg, the saidlinks having their upper ends eccentrically connected with the said yokeat points so located on the said yoke that lines drawn through the saidpoints and the central pivot of the yoke shall form an angle 90 degreeswith each other at the said central pivot, the whole being constructedso that as the legs are moved the marking elements will be heldparallel.

3. In a compass or' divider a pair of chambered legs each having anopening in the side and a U-shaped chamber below said opening, a pivotuniting the upper ends of the said legs, marking elements pivoted to thelegs at the lower ends of the said U- shaped portions, a link mountedwithin each leg, the lower end of each link being disposed partly withinthe said U-shaped portion and connected pivotally with the markingelement pivoted thereto and means associating the upper ends of thelinks with the upper ends of the leg so that as the legs are moved themarking elements will be held parallel.

4. A compass or divider comprising a pair of legs, the upper ends of thesaid legs being pivotally united to form the head, a hollow handlehaving a yoke at its lower end and wings depending from the said yoke,said wings adapted to embrace the upper ends of the legs, meansconnecting the said wings with upper ends of the legs whereby the saidhandle is maintained in a position centrally over the head of theinstrument, a yoke disposed between the upper ends of the legs andpivoted concentrically therewith, an extension from the said yokebetween the head of the legs reaching upward into the said hollow handleand engaging the sides of the said hollow handle, marking elements onthe lower ends of the legs and a link associated with each leg, eachlink having its lower end connected to the marking element on itsassociated leg and each link having its upper end pivotally connectedwith the yoke between the upper ends of the legs, the whole being soconstructed that as the legs are moved the marking elements will be heldparallel.

5. A compass or divider comprising a pair of legs the upper ends of bothsaid legs pivotally united to form the head, a hollow handle havingwings depending therefrom, said wings disposed to embrace the upper endsof the legs, means connecting these said wings with the upper ends ofthe legs whereby the handle is maintained in a position centrally overthe head of the instrument, a yoke member disposed between the upperends of the legs and pivoted concentrically therewith, a bifurcatedextension from the said yoke member extending upward into the saidhollow handle and having spring contact with the inside of the saidhollow handle, marking elements on the lower end of the legs, and a linkassociated with each leg, each link having its lower end pivotallyconnected to the marking element on its associated leg and each linkhaving its upper end pivotally connected with the yoke member betweenthe upper ends of the legs, the whole being so constructed that as thelegs are moved the marking elements will be held parallel.

6. A compass or divider comprising a pair of legs united by a pivot intheir upper ends, a handle having wings depending from its lower end anddisposed to embrace the upper ends of the legs, each of the said wingsbeing provided with a vertical slot to permit motion on the centralpivot of the heads of the legs, and each of said wings also having ahorizontal slot, and a pin on the upper end of each leg to engage thehorizontal slot in the adjacent wing of the handle, a yoke-memberdisposed between the upper ends of the legs, means connecting the saidyoke with the said handle, marking elements on the lower ends of thelegs and links connecting the said marking elements with the saidyoke-member between the upper ends of the legs, the whole being soconstructed that as the legs are moved the marking elements will be heldparallel.

7. A compass or divider comprising a pair of legs united by a pivot intheir upper ends, marking elements pivoted to the lower ends of the saidlegs, a link associated with each leg and having pivotal connection withthe markmg element on the lower end of its associated leg, meansconnecting the upper ends of the links with the upper ends of the legs,each link having a recess in the side and a spring in the recess of eachlink to produce tension of the pivotal connections of the said links,legs, and marking elements.

8. A compass or divider comprising a pair of legs united by a pivot intheir upper ends, marking elements pivoted to the lower ends of the saidlegs, ayoke member associated with the upper ends of the legs andpivoted concentrically therewith, said yoke comprising two yoke-platesspaced apart, a link associated with each leg, each link having itslower end connected with the marking element on its associated leg andits upper end pivoted between the two said yoke-plates, means connectingthe yoke with the upper ends of the legs whereby the vertical axis ofthe said yoke is maintained in a position midway between the positionsof the two legs, means for clamping the said upper ends of the legs andyoke plate together so as to frictionally engage the upper ends of thelinks, the whole being so constructed that as the legs are moved, themarking elements will be held parallel.

9. A compass or divider comprising a pair of legs having a yoke-memberassociated with their upper ends, the said yokemember comprising twoyoke-plates spaced apart, a pivot uniting the upper ends of the legs andthe said yoke-plates together, means connecting the yoke-member with theupper ends of the legs whereby they are maintained in their properrelation to the said legs, marking elements pivoted to the lower ends ofthe legs and a link associated with each leg, each link having its lowerend connected with the marking element on its associated leg and itsupper end pivoted between the said two yoke-plates, and means forproducing pressure on the said yoke-plates whereby they are caused tofrictionally engage the upper ends of the links, the whole beingconstructed so that as the legs are moved the marking elements will beheld parallel.

10. A compass or divider consisting of a pair of legs united by a pivotin their upper ends, a link associated with each leg, the said linkshaving their upper ends connected with the upper ends of the legs, amarking element pivoted to the lower end of each leg and its associatedlink, each markingele ment comprising two plates having their lowerportions connected together and a'pin joining said plates and adapted tocause pressure of the said plates on the lower ends of the link and legto which they are pivoted, said pin being so located that the pressureproduced by it shall be distributed between the said link and leg towhich said marking-element is pivoted.

11. In compasses or dividers of that class having automaticallyparallelizing points, a leg, a link, means pivoting the upper ends ofsaid leg and link together, a marking element socket member comprisingtwo plates connected together at their lower ends, the upper portions ofsaid plates being adapted to engage the lower ends of said leg and link,and a pin joining said plates at a point above where the said plates areconnected together, said pin being adapted to produce pressure of thesaid plates on the lower end of the leg and link associated therewith,and being so located that the pressure produced by the said pin shall bedistributed between the said leg and link, and a socket carried by oneof the said plates to hold a marking-element.

12. A marking element holder for a compass consisting of a channeled orU-shaped member adapted to receive the marking element, a member havingits upper end connected to the upper end of the channeled member andhaving its lower end normally disposed between the sides of thechanneled member in contact with the marking element, and means wherebythe said members are caused to press upon the marking element so as tofrictionally hold the same.

13. A marking element holder for a compass consisting of a U-shaped orchanneled member adapted to receive the marking element, a memberdisposed in opposing relation to the said channeled member and havingits lower end normally disposed between the sides of the channeledmember so as to

